Lens-notching machine.



R. H. UHLEMANN.

LENS NOTCHING MACHINE.

APPLICATION FILED JULY 6, 1914;

Patented Mar. 30, 1915.

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R, H. UHLEMANN; LENS m'rcmm .1; AGHINB. APPLIOATIONFILM) JULY 5, 1014.

Patented; Mar. 30, 1915.

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Messrs.

an? ion.

RICHARD H. UHLEMANN, OF CHICAGO, ILLINOIS.

LENS-NOTCHIN G MACHINE.

Specification of Letters Patent.

llatented Mar. 30, 1915.

Application filed July 6, 1914; Serial No. stain.

MANN, a citizen of the United States of (America, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements --i-n Lens-Notchmg Machines, of which the following is a specification.

This invention relates to a grinding mechanism for forming holding notches in the perimeter of eyeglass lenses, and has for its object to provide a simple and etiicient mechanism for grinding a air of notches [in spacedrelation to each 0t rer in the edge of a lens in a rapid and accurate manner,

and equidistant from a line representing the 'major diameter of the lens, all as will herei'nafter more fully appear.

i In the accompanying drawin sqFigure 1, is a plan view illustrating t e general arrangement of parts of a machine embod Fig. 2, is an Fig. 3, is an enlarged sectional elevation, on line rc-a:, Fig. 1. Fig. 4, is a detail horizontal section on line wm', Fig. 3, illustrating the con "'struction of the main member of the swinging lens holder of the present'mechanism.

Fig. 5, is a similar view on line w m Fig.

3, illustrating the construction of the swinging head upon which the lens holding members are supported. Fig. 6, is a detail sectional plan of the sliding carriage, upon i Fig. 2.

' which the swinging head. and lens holding members are pivotally mounted.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents a grinding disk mounted on a horizontal arbor 2 which is operatively connected to a suitable power source, such for instance "as an electric motor 3, as illustrated in Fig. 1.

4. is a fixed track disposed in transverse relation to the axis of the grinding disk 1 and arbor 2, and preferably comprising a non-circular rail supported above the machine base by end standards 5, as shown in 6 designates a carriage slidingly mounted on the track 4, and provided with a vertically disposed socket or sleeve 7, for the pivotal mounting of the swinging head and lens holding members hereinafter described.

8, designates a screw-threaded shaft journaled on the end standards 5 aforesaid, and having operative engagement with the carpreferably of the flat plate formation shown,

and having a depending trunnion 11, at the end adjacent to the grinding disk 1, by means of which it is pivotally mounted in the sleeve or socket 7 aforesaid, to have a swinging movement in a horizontal plan.

Such movement is limited by a depending pin 12 on the head 10, and a pair of spaced stop lugs 13 on the sleeve 7, as shown in Fig. 6.

14 designates a secondary swinging head, preferably of the flat plate formation shown, and which is pivoted near its inner end to the aforesaid head 10, by a depending pivot pin 15, having bearing in a central orifice formed in" the trunnion 11, of the head 10. As so arranged the swinging head 14 is capable of independent swinging adjustment on the head 10, in effecting the required adjustment of the parts in operating on different sizes and forms of lenses.

16 designates a pair of counterpart jaws or abutments disposed in spaced relation to each other at the inner end of the swinging head 14, and adapted to act as positioning stops or abutments for the end of the lens operated on.

17 designates a clamping bolt arranged at the outer end of the swinging head 14 and having movement in a sector shape slot at the outer end of the swinging head 10, and adapted to clamp the heads 10 and 14; together at the required adjustment.

- '18 designates a holding plate slidingly mounted on the swinging head 14, by a guide pin 19 and the shank portion of a clamping bolt 20, moving in an elongated slot in the head 14, aforesaid. The inner end of said holding plate 18 is provided with a pair of counterpart jaws 21, having an opposed relation to the above described abutment aws 16, of the head 14. r

22 designates a spring extending from the guide pin 19 to an inner portion of the head 14, and adapted to draw the sliding plate 18 with its jaws -21 toward the abutment jaws 16 aforesaid and hold an eyeglass lens in proper position for the grinding operation. In the described arrangement of parts, the

clamping bolt 20 is adapted for use in clamping the adjustable holding plate 18, either in its holding engagement with the lens, or in a retracted position previous to an insertion of the lens in place, or a subsequent removal thereof.

23 designates a hood adapted to house a larger portion of the grinding disk 1, and having a tubular extension 24 adapted to contain a filling of absorbent material capable of holding a body of water and feeding the same to the grinding disk 1 as required in the grinding operation. In the construction shown the hood 23 and its tubular extension 2% are carried on a supporting arm 25 pivoted to one of the track standards 5, and adapted to swing out of the way when access is required to the grinding disk.

26 designates a removable cover or cap carried by the carriage (i and extending over the inner track standard 5, to protect the track 4 from the grit, etc, in the grinding operations The operation of the mechanism is as fol- 1ows :lVith the carriage 6, and the parts carried thereon, in an outer position, the sliding plate 18 with its holding jaws 21 are pulled away from the abutment jaws 16 of the head 14, and an eyeglass lens inserted be tween the two pair of jaws 16 and 21, and said jaws are allowed to come together upon the lens under the influence of the spring 22. The heads 10 and 1-4 are swung into a position which brings the stop pins 12 of the head 10 into contact with one of the stop lugs 13 of the carriage'ti. The operator then, by a rotation of the screw-shaft 8, gradually feeds the parts toward the grinding disk 1, to grind a notch in the perimeter of the lens operated on, after which by a re verse motion of the screw-shaft 8, the parts are returned to the position first described. The heads 10 and 1 1 are then swung into a 'position which brings the stop pin 12, into contact with the other stop lug 13 of the carriage 6, after which the operator by a rotation of the screw-shaft 8 brings the lens into contact with the grinding disk 1 to form a second notch in the perimeter of the lens and in spaced relation to the first formed notch.

Having thus fully described my ,said inention what I claim as new and desire to secure by Letters Patent. is

1. In a machine for forming notches in the perimeter of eyeglass lenses, the combination of a grinding disk, a carriage mounted to move to and from said grinding disk, and a lens. holding means mounted on said carriage in a manner which permits of a swinging adjustment of the lens holding means upon said carriage, substantially as 'set forth. H

2. In a machine for forming notches in the perimeter pf eyeglass lenses, the combination of a grinding disk, a carriage mounted to move to and from said grinding disk, a lens holding means mounted on said carriage in a manner which permits of a swinging adjustment of the lens holding means upon said carriage, and means for restricting the swinging ad ustment of the lens holding means, substantially as set forth.

3. In a machine: for forming notches in the perimeter o1 eyeglass lenses, the combination of a grinding disk, a carriage mounted to move to and from said grinding disk, and a, lens holding means mounted on said carriage by a trunnion on its inner end engaging a vertical socket on the carriage, and having a swinging adjustment on said trunnion, substantially as set forth.

4. In a machine for forming notches in the perimeter of eyeglass lenses, the combination of a grinding disk, a carriage mounted to move to and from said grinding disk, a lens holding means mounted on said carriage by-a trunnion on its inner end engaging a vertical socket on the carriage, and having a swinging adjustment on said trunnion, and means for restricting the swinging adjustment of the lens holding means, substantially as set forth.

5. In a machine for forming notches in the perimeter of eyeglass lenses, the combination of a grinding disk, a fixed track, a carriage mounted on said track and adapted to have movement to and from the grinding disk, a primary head connected to said carriage by avertical pivot connection, means for restricting thepivotal movement of said head, a secondary head connected to said primary head by a vertical pivot connection, means for clamping said heads in their adjusted relation, and lens holding means carried by said secondary heiid, substantially as set forth;

6. In a machine for forming notches in the perimeter of eyeglass lenses, the combination of a grinding disk, a fixed track, a carriage mounted on said track and adapted to have movement to and from the grinding disk, a primary head connected to said carriage by a vertical pivot connection, means for restricting the pivotal movement of said head, a secondary head connected to said primary head. by a vertical pivot connection, means for clamping said heads in their adjusted relation, and lens holding means carried by said secondary head, the same comprising a holding plate.

7. In a machine for forming notches in the perimeter of eyeglass lenses, the combination of a grinding disk, a raised track, a carriage sliding on said track and provided with a vertical bearing sleeve, 2. primary head connected to said carriage by a vertical trunnion on its inner-end fitting the sleeve aforesaid, a secondary head connected near its inner end to said primary head by a verllt marriage slidin .Wlilll. a vertica tical pivot in fitting a central bore in the trunnion of the primary head, and means carried by said secondary head for holding a lens to be notched, substantially as set forth. 7

8. In a machine for forming notches in Y the perimeter of eyeglass lenses, the eomhination of a grinding disk, a raised track, a on said track and provided bearing sleeve, a primary tees connected to said carriage by a vertioal trunnion on its inner end fitting the .fleeve aforesaid, a secondary head connected near'its inner end to said primary head by ajvertical pivot'pin fitting a central bore in the trunnion of the primary head, said secondary head havin holding jaws at its vertical pivot pin fitting a central bore in. the trunnion of the carried by'said secon ary head for holding a lens to be notched, and means for restricting the pivotal movement of the primary hang, iubstantially as set forth.

of eyeglass lenses, the combination of a grinding disk, a raised track, a carriage sliding on. said track and provided with a vertical bearing sleeve, .a primary head connected to said carriage by a vertical trunnion on its inner end fitting the sleeve aforesaid, a secondary head connected near its inner end to said primary head by a vertical pivot pin fitting a central bore in the trunnion of the primary head, said secondary head having holdin jaws at'its inner an a holding plate sli ingl mounted on the secondary head and provi d with bolding jaws on its inner end, and means for restricting the pivotal movement of the primary head, substantially as set'forth.

Signed at Chicago, Illinois, this 30th day of June, 191.4:-

RICHARD H. UHLEJMANN.

Witnesses:

ROBERT Bpims, Wm. B. DELEMANN.

riniary head, means n a machine for forming notches in a the perimeter 

